It is a fulacht fia, a term used to describe the remains of an ancient outdoor cooking site, typically consisting of a horseshoe-shaped mound of shattered rock surrounding a depression where a trough once held water. The conventional interpretation is that stones were heated in a fire and then dropped into the water-filled trough to bring it to the boil, a method that could cook a considerable quantity of meat relatively efficiently. Thousands of these sites have been recorded across Ireland, concentrated particularly in the west and south, and most date to the Bronze Age, roughly between 1500 and 500 BC.

The characteristic mound shape comes from the gradual accumulation of discarded stone. Each cycle of heating causes rock to fracture and become useless for retaining heat, so spent stone was simply thrown aside, building up the distinctive curved bank over generations of use. The troughs themselves were sometimes wooden, sometimes cut into bedrock or clay, and a few have been found still waterproof after three millennia. Cloonconragh sits within a county where boggy, low-lying ground provided exactly the conditions these sites seem to favour, with ready access to water and plentiful timber for fuel. Whether they served communities over long periods or were used more episodically by seasonal gatherings remains debated among archaeologists, as does the question of whether cooking was always their primary purpose at all.